The combined effect of curvature and refraction over a distance L kilometres is 

What should come in place of the question mark in the following number series?2, 12, 130, 56, ?, 132 

section lining is drawn with line at 

The standard of living in a country is represented by its  

The _____ drawing shows how the components are added to their proportions. 

Which of the followings mortar is most suitable for construction work in water logged areas? 

For true difference in elevations between two points A and B, the level must be set up 

For preparation of a contour plan for a route survey